Enable Style/MutableConstant

.rubocop.yml

.rubocop_todo.yml

app/controllers/admin/system_info_controller.rb

app/controllers/concerns/service_params.rb

app/controllers/jwt_controller.rb

app/finders/issuable_finder.rb

app/finders/todos_finder.rb

app/helpers/issuables_helper.rb

app/models/application_setting.rb

app/models/ci/runner.rb

app/models/commit.rb

app/models/concerns/cache_markdown_field.rb

app/models/concerns/has_status.rb

app/models/label.rb

app/models/members/group_member.rb

app/models/members/project_member.rb

app/models/merge_request_diff.rb

app/models/notification_setting.rb

app/models/project.rb

app/models/project_feature.rb